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From: Eli Zaretskii <eliz@gnu.org>
To: help-gnu-emacs@gnu.org
Subject: Re: Maybe we can improve this function call-process-to-string?
Date: Thu, 08 Apr 2021 21:36:22 +0300	[thread overview]
Message-ID: <83h7kg8vyx.fsf@gnu.org> (raw)
In-Reply-To: <YG9Iq4NkB5RZC8n4@protected.localdomain> (message from Jean Louis on Thu, 8 Apr 2021 21:17:15 +0300)

> Date: Thu, 8 Apr 2021 21:17:15 +0300
> From: Jean Louis <bugs@gnu.support>
> Cc: help-gnu-emacs@gnu.org
> 
> * Eli Zaretskii <eliz@gnu.org> [2021-04-08 19:30]:
> > So you actually need the numbers reported by those commands?  if so,
> > you can read them from the buffer into which the command's output is
> > stored, right?  You don't actually need the numbers in their string
> > form, right?
> 
> In that particular example numbers are just used as string, but
> sometimes I need numbers. That may not be most important. I do not
> understand your method of getting output from external command. 
> 
> How practically to do it?
> 
> I understood reading it from buffer is different than reading from
> shell-command-to-string.
> 
> Then to have output in buffer, I need call-process, but then again I
> need to enter that buffer and read string out of it.

You can use with-current-buffer for that.

> Again I have to use strings there.

Depends on what you want to do with that string.  My point is:
whatever you want to do with the string, do it with buffer text
instead.

> > > I would not know how to get output from system command by using those
> > > functions without using shell-command-to-string or call-process
> > 
> > You said buffer-substring doesn't take a buffer as an argument.  I'm
> > suggesting something like
> > 
> >   (with-current-buffer (get-buffer "foo")
> >     (buffer-substring ...))
> 
> That again comes back as a string, right?

Yes, but only because _you_ asked a buffer-substring.



  reply	other threads:[~2021-04-08 18:36 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-08  7:40 Maybe we can improve this function call-process-to-string? Jean Louis
2021-04-08  7:55 ` Eli Zaretskii
2021-04-08 11:53   ` Jean Louis
2021-04-08 13:39     ` Eli Zaretskii
2021-04-08 15:56       ` Jean Louis
2021-04-08 16:25         ` Eli Zaretskii
2021-04-08 18:17           ` Jean Louis
2021-04-08 18:36             ` Eli Zaretskii [this message]
2021-04-08 18:44               ` Jean Louis
2021-04-08 17:18         ` Arthur Miller
2021-04-08 18:32           ` Jean Louis
2021-04-08 19:41             ` Arthur Miller
2021-04-09  8:52               ` Jean Louis
2021-04-09 10:07                 ` tomas
2021-04-08 13:08 ` Michael Albinus
2021-04-08 15:50   ` Jean Louis
2021-04-08 17:49 ` Stefan Monnier
2021-04-08 18:33   ` Jean Louis
2021-04-08 18:40   ` Jean Louis

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